CN204269739U - Based on thunderbolt diagnosis and the real time warning device of leakage conductor - Google Patents
Based on thunderbolt diagnosis and the real time warning device of leakage conductor Download PDFInfo
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- CN204269739U CN204269739U CN201420662734.1U CN201420662734U CN204269739U CN 204269739 U CN204269739 U CN 204269739U CN 201420662734 U CN201420662734 U CN 201420662734U CN 204269739 U CN204269739 U CN 204269739U
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Abstract
The utility model provides thunderbolt diagnosis based on leakage conductor and real time warning device, comprise: for measuring the data acquisition module of discharge current, be connected with data acquisition module and for obtain discharge current amplitude, direction and spectrum information signal processing module, the reason causing leakage conductor action is judged according to the amplitude of discharge current, direction and spectrum information, and identifying and store the thunderbolt identification module of thunder and lightning polarity, thunderbolt type, leakage conductor actuation time and number of times, this thunderbolt identification module is connected with described signal processing module; Also comprise and be connected with described data acquisition module, signal processing module, thunderbolt identification module respectively and the supply module of working power is provided.Can actuation time of record circuit lightning arrester, action reason and number of times, can contrast to carry out thunderbolt event analysis with concrete thunderbolt event, by discharge current waveform parameter during leakage conductor action, leakage conductor action reason, thunderbolt type are identified.
Description
Technical field
The utility model relates to lightning-protecting engineering field, particularly relates to the thunderbolt diagnosis based on leakage conductor and real time warning device.
Background technology
Compare other lightning protection measures, transmission line of electricity installation leakage conductor, particularly lightening activity are strong or soil resistivity is high, reduce the section of stake resistance difficulty, can effectively reduce trip accident rate, improve the lightning withstand level of electric power line pole tower.Therefore, installing and using of leakage conductor, can obtain good lightning protection effect, and the operational reliability of electrical network is improved greatly.
Leakage conductor extensively adopts band external series gap structure, and owing to isolating with gap between lightning arrester body and wire, when system is normally run, leakage conductor does not bear the effect of line operating voltages.Therefore, there is not problem of aging in lightning arrester resistor disc, even if lightning arrester body breaks down, due to the buffer action in gap, also unlikelyly causes short circuit and cause line tripping.
Although existing line lightning arrester runnability, lightning protection effect are better, leakage conductor monitoring technology and the effect in the performance of circuit Thunder Protection thereof are still left to be desired, and are mainly reflected in the following aspects:
(1) leakage conductor only has action frequency writing function, cannot the operation of recording time, itself and concrete thunderbolt event cannot be contrasted, can not be used for the event analysis that is struck by lightning.
(2) leakage conductor does not record leakage current parameter, size of current, spectrum information during action cannot be learnt, by the thunderbolt information comparative analysis of itself and lightning location system, cannot cannot judge action reason simultaneously, when lightning protection effect is evaluated, easily occur deviation.
(3) thunderstorm weather and neighbouring circuit generation lightning fault often during lightning arrestor movement, action message cannot be passed to relevant operations staff in time, is unfavorable for that carrying out rapidly circuit spy patrols task, and thunderbolt hidden troubles removing work limitation is difficult to ensure.
(4) lightning failure point searching work is comparatively complicated, and existing lightning arrester does not make a decision thunderbolt type, cannot record the lightning protection properties weakness of near zone shaft tower and add up, be unfavorable for carrying out circuit relevant portions Lightning Strike Risk Evaluation.
Based on above-mentioned situation, be necessary based on existing line lightning arrester, develop and a kind ofly can record discharge current waveform parameter, judge lightning fault type and lightning fault diagnosis and the real time warning device of information can be sent in time to operation maintenance personnel, but also there is no such device at present.
Summary of the invention
The purpose of this utility model is to propose a kind of thunderbolt diagnosis based on leakage conductor and real time warning device, with according to measurement action current feature, identifies leakage conductor action reason, thunderbolt type, and sends information to operations staff.
In order to solve the problems of the technologies described above, the technical solution of the utility model is as follows:
Based on thunderbolt diagnosis and the real time warning device of leakage conductor, be arranged on the shaft tower of installation leakage conductor, comprise: for measuring the data acquisition module of the discharge current causing leakage conductor action, be connected with data acquisition module and described discharge current carried out analog to digital conversion to obtain the amplitude of discharge current, the signal processing module of direction and spectrum information, according to the amplitude of described discharge current, direction and spectrum information judge the reason causing leakage conductor action, and identify when being struck by lightning and causing leakage conductor action and store thunder and lightning polarity, thunderbolt type, the thunderbolt identification module of leakage conductor actuation time and number of times, this thunderbolt identification module is connected with described signal processing module, also comprise and be connected with described data acquisition module, signal processing module, thunderbolt identification module respectively and the supply module of working power is provided.
Described data acquisition module comprises the straight-through current transformer be separately positioned on tower body and leakage conductor protective valve; the output terminal of described straight-through current transformer is provided with the pre-process circuit for exporting equal proportion voltage waveform signal, and this pre-process circuit is made up of the shaping be electrically connected successively, amplitude limit and filtering circuit.
Described signal processing module comprises the spectrum computing unit for distributing according to the waveshape power frequency component of described equal proportion voltage waveform signal, and for the amplitude Orientation unit in the amplitude that identifies described equal proportion voltage waveform signal and direction.
Described thunderbolt identification module comprises for analyzing described frequency component and exporting the action reason judging unit of high level when being struck by lightning and causing leakage conductor action, for exporting the thunderbolt type judging unit of thunder and lightning polarity and thunderbolt type according to the amplitude of equal proportion voltage waveform signal and direction when receiving described high level, and for storing described thunder and lightning polarity, thunderbolt type and the thunderbolt movement counting unit of leakage conductor actuation time and number of times, described action reason judging unit, thunderbolt type judging unit, thunderbolt movement counting unit are electrically connected successively.
The utility model has the advantages that: simple and reasonable for structure, can actuation time of record circuit lightning arrester, action reason and number of times, thus can contrast with concrete thunderbolt event, for the event analysis that is struck by lightning, and by discharge current waveform parameter during leakage conductor action, leakage conductor action reason, thunderbolt type are identified, thus can send real-time information to operation maintenance personnel in time, patrols to carry out rapidly route spy, investigate hidden danger or maintenance.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is the structured flowchart of data acquisition module and signal processing module;
Fig. 3 is that signal processing module frequency components calculates criterion principle schematic;
Fig. 4 is the distribution of current analogous diagram of thunderbolt;
Fig. 5 is the distribution of current analogous diagram of back flashover;
Fig. 6 is the analogous diagram of switching overvoltage line arrester action current;
Fig. 7 is thunderbolt type judging unit logical circuitry;
Fig. 8 is the signal flow graph of data acquisition module, message processing module, thunderbolt identification module;
Fig. 9 is the structured flowchart of supply module;
Description of reference numerals: 1, supply module; 2, data acquisition module; 3, signal processing module; 4, be struck by lightning identification module; 5, information sending module; 6, leakage conductor; 7, tower body; 8, straight-through current transformer.
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in further detail the utility model below in conjunction with the drawings and specific embodiments.
Embodiment
As shown in the figure, based on thunderbolt diagnosis and the real time warning device of leakage conductor, be arranged on the shaft tower of installation leakage conductor 6, comprise: for measuring the data acquisition module 2 of the discharge current causing leakage conductor action, be connected with data acquisition module 2 and described discharge current carried out analog to digital conversion to obtain the amplitude of discharge current, the signal processing module 3 of direction and spectrum information, according to the amplitude of described discharge current, direction and spectrum information judge the reason causing leakage conductor action, and identify when being struck by lightning and causing leakage conductor action and store thunder and lightning polarity, thunderbolt type, the thunderbolt identification module 4 of leakage conductor actuation time and number of times, this thunderbolt identification module 4 is connected with described signal processing module 3, also comprise and be connected with described data acquisition module 2, signal processing module 3, the identification module 4 that is struck by lightning respectively and the supply module 1 of working power is provided.
Thunderbolt diagnosis of the present utility model and real time warning device are arranged on shaft tower, are connected with leakage conductor 6, by increasing functional module at some structure place of leakage conductor 6, make it have thunderbolt identification, warning function.
In the present embodiment, whole device composition framework as shown in Figure 1.Chief component comprises supply module 1, data acquisition module 2, signal processing module 3, thunderbolt identification module 4, information sending module 5.
One, data acquisition module
Data acquisition module 2 comprises the straight-through current transformer 8 of the tower body 7 and leakage conductor protective valve (ZnO protective valve) being separately positioned on shaft tower; the output terminal of two straight-through current transformers 8 is provided with shaping, amplitude limit, filtering circuit; and the integrating circuit etc. of signal, for the pre-service of signal.
To be installed on two centre path current sensors of tower body 7 and protection of arrester valve for measuring terminals; because output voltage is directly proportional to current differential; output voltage need be carried out integral operation and be reduced into the voltage signal be directly proportional to actual measurement electric current; the process means such as additional shaping, amplitude limit, filtering simultaneously; export the voltage waveform signal proportional with action current; namely the equal proportion voltage waveform signal waveform that can be used for subsequent analysis is obtained; by analyzing this voltage waveform, thus obtain the relevant information of action current.
Two, signal processing module
Signal processing module 3 comprises spectrum computing unit and amplitude Orientation unit, spectrum computing unit is used for distributing according to the waveshape power frequency component of described equal proportion voltage waveform signal, and amplitude Orientation unit is for identifying amplitude and the direction of described equal proportion voltage waveform signal.
A function of signal processing module 3 obtains amplitude of lightning current, direction by its digitizing, this part mainly adopts peak value maintenance, voltage reference circuit and voltage comparator to be connected in sequence, i.e. amplitude Orientation unit, after being arranged on the integrating circuit of data acquisition module 2.
Another function of signal processing module 3 is its frequency component of the equal proportion voltage waveform signal waveshape distribution after utilizing process, according to the criterion 20lg (Amax/A)≤40 of setting, namely be 1% of largest component with relative components be boundary, obtain electric current dominant frequency component scope f < fm, principle as shown in Figure 3.This part and spectrum computing unit, after being arranged on integrating circuit, connected to form successively by frequency spectrum counting circuit, frequency component analysis circuit.
Three, be struck by lightning identification module
Thunderbolt identification module 4 comprises action reason judging unit, thunderbolt type judging unit, thunderbolt movement counting unit.
A. action reason judging unit
Judge whether measure electric current is that lightning surge earial drainage is formed from frequency spectrum angle; If so, high level (R=1) is then exported, otherwise output low level (R=0).
Frequency critical value fm is obtained according to the distribution of power frequency component, if fm < is 15kHz, then think that the action of leakage conductor 6 is caused by switching overvoltage, if fm > is 80kHz, then think that the action of leakage conductor 6 is caused by Lightning Over-voltage.Visible, it is actually the process selected between Lightning Over-voltage and these two reasons of maloperation superpotential to the deterministic process of leakage conductor action reason, can realize based on the existing selection circuit of the art.
Above-mentioned switching overvoltage, lightning surge action recognition principle are as follows:
1, the superpotential feature of two types
1. switching overvoltage: the duration, from hundreds of μ s to some cycles of power frequency, can be summarized as two kinds of typical waveforms: is superpose a hundreds of high frequency attenuation wave of oscillation to few kilohertz on power-frequency voltage component; Two is superpose an aperiodicity shock wave on power-frequency voltage component, and wave front time is 0.1 ~ 0.5ms, and half time to peak about 3 ~ 4ms, frequency is within a few KHz Hz.
2. lightning surge: wave front time is positioned at the scope of 1 ~ 4 μ s, average out to 2.6 μ about s; Wavelength (half time to peak) is positioned at the scope of 20 ~ 100 μ s, and majority is 40 μ about s, and frequency is at 10k ~ 100kHz.
2, verify
As Fig. 4-6 give lightning surge (shielding and counterattack), when switching overvoltage, the action current of the leakage conductor 6 obtained by simulation calculation, the frequency component distribution plan of the electric current on ground is entered by shaft tower, in figure, ordinate is current value, horizontal ordinate is the time, Fig. 4 (a) is the distribution of current of leakage conductor during thunderbolt, Fig. 4 (b) is for entering the distribution of current on ground by shaft tower during thunderbolt, Fig. 5 (a) is the distribution of current of leakage conductor during back flashover, Fig. 5 (b) is for entering the distribution of current on ground by shaft tower during back flashover, Fig. 6 is switching overvoltage line arrester action current.From upper, under different situations, the lightning arrestor movement time is respectively: thunderbolt (< 200 μ s, μ s level), switching overvoltage (> 2ms, ms level), lightning current frequency component mainly distributes as follows: thunderbolt (0 ~ 120kHz), back flashover (0 ~ 100kHz), switching overvoltage (0 ~ 10kHz) is consistent with mentioned above.
B. be struck by lightning type judging unit
The sense of current that the straight-through current transformer 8 that note is arranged on leakage conductor 6 is measured is D1, the direction of current that the straight-through current transformer 8 being arranged on tower body 7 measures is D2, D1 and D2 is referred to as D, the electric current positive dirction of the straight-through current transformer 8 wherein on leakage conductor 6 is designated as wire → cross-arm, the electric current positive dirction of the centre path current sensor of tower body 7 is cross-arm → earth's surface, if identification electric current is positive dirction, then make D=1, otherwise be D=0.Using the digital quantity of D1, D2, EN (meeting action reason signal R) as the input of logical circuit as shown in Figure 7, obtain two digital quantities representing thunderbolt type S, thunder and lightning polarity T.Wherein left side with or door there is ena-bung function, EN holds input quantity to be R, namely only just work because of circuit when thunderbolt causes at lightning arrestor movement, is strike back when being shielding, S=0 when exporting S=1; Right side be XOR gate, export T=1 time be positive polarity thunder, output T=0 time be negative polarity thunder.
Thunder and lightning polarity, thunderbolt type judge principle:
1, during shielding, lightning current derives from wire, after leakage conductor 6 action, and thunder and lightning earial drainage current through line lightning arrester 6, and enter ground by shaft tower.
2, during counterattack, lightning current derives from shaft tower top, and after leakage conductor 6 action, a thunder and lightning earial drainage part enters wire through leakage conductor 6, and another part enters ground by shaft tower.
Thunder and lightning polarity, thunderbolt type sensor measurement current properties and Logic judgment truth table are as shown in table 1,2.
| Thunder and lightning polarity | Thunderbolt type | Lightning arrester current direction | Tower body 7 current direction |
| Just | Shielding | Wire → cross-arm | Cross-arm → earth's surface |
| Just | Counterattack | Cross-arm → wire | Cross-arm → earth's surface |
| Negative | Shielding | Wire → cross-arm | Cross-arm → earth's surface |
| Negative | Counterattack | Cross-arm → wire | Cross-arm → earth's surface |
Table 1
| Thunder and lightning polarity (T) | Thunderbolt type (S) | Lightning arrester direction of current (D1) | Tower body 7 direction of current (D2) |
| 1 | 1 | 1 | 1 |
| 1 | 0 | 0 | 1 |
| 0 | 1 | 0 | 0 |
| 0 | 0 | 1 | 0 |
Table 2
C. be struck by lightning movement counting unit
Adopt the counter with ena-bung function, if judge, action reason is as thunderbolt, i.e. R=1, then add 1 from command of execution counter by thunderbolt action frequency, and record is struck by lightning actuation time simultaneously, and stored in storer.
See Fig. 9, data acquisition module 2, signal processing module 3, thunderbolt identification module 4 flow to according to above-mentioned signal and link together.
Four, supply module
Supply module 1 comprises sun power electroplax and battery, and induction energy fetching method also can be adopted during conditions permit to power; Device electricity consumption part comprises the various active circuits such as integrating circuit, signal processing circuit, logical circuit, counter, and based on direct current supply.Energy source is mainly sun power, flows through alternating current and Insulation Coordination meets the demands as wire, can adopt wire induction energy fetching as a supplement.Supply module 1 can adopt structure of block diagram as shown in Figure 8.
Preferably, all right configuration information sending module, to send thunderbolt diagnosis and Realtime Alerts information to operation maintenance personnel in time.
Five, information sending module
Information sending module 5 comprises the data storage cell be connected with described signal processing module 3, and sends the GPRS/GSM transmitter unit of diagnosis and alarm report to operation maintenance personnel by GPRS/GSM.
According to different disposal stage preservation data in the memory unit, under clearly thunderbolt causes the prerequisite of leakage conductor 6 action, i.e. R=1, integrate above-mentioned each module, the information that cell processing analysis draws, comprise thunder and lightning polarity, thunderbolt type, lightning arrestor movement time and action current amplitude etc., according to the contacts list kept in advance, above-mentioned information is carried out long-distance transmissions by GPRS/GSM communication module, with GPRS transmission pattern, also can adopt GSM mode by SIM card directly and mobile phone terminal carry out communication, information is sent to the mobile phone of related personnel with short message mode, this GPRS/GSM transmitter unit can be built by single-chip microcomputer, carry out AT order by serial ports to send and data transmission.
The utility model is simple and reasonable for structure, can actuation time of record circuit lightning arrester 6, action reason and number of times, thus can contrast with concrete thunderbolt event, for the event analysis that is struck by lightning, and by discharge current waveform parameter during leakage conductor 6 action, leakage conductor 6 action reason, thunderbolt type are identified, sends information to operation maintenance personnel in time, patrol to carry out rapidly route spy, investigate hidden danger or maintenance.
Above-listed detailed description is illustrating for the utility model possible embodiments, and this embodiment is also not used to limit the scope of the claims of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and all should be contained in the scope of the claims of this case.
Claims (4)
1. based on thunderbolt diagnosis and the real time warning device of leakage conductor, be arranged on the shaft tower of installation leakage conductor, it is characterized in that, comprise: for measuring the data acquisition module of the discharge current causing leakage conductor action, be connected with data acquisition module and described discharge current carried out analog to digital conversion to obtain the amplitude of discharge current, the signal processing module of direction and spectrum information, according to the amplitude of described discharge current, direction and spectrum information judge the reason causing leakage conductor action, and identify when being struck by lightning and causing leakage conductor action and store thunder and lightning polarity, thunderbolt type, the thunderbolt identification module of leakage conductor actuation time and number of times, this thunderbolt identification module is connected with described signal processing module, also comprise and be connected with described data acquisition module, signal processing module, thunderbolt identification module respectively and the supply module of working power is provided.
2. the thunderbolt diagnosis based on leakage conductor according to claim 1 and real time warning device; it is characterized in that; described data acquisition module comprises the straight-through current transformer be separately positioned on tower body and leakage conductor protective valve; the output terminal of described straight-through current transformer is provided with the pre-process circuit for exporting equal proportion voltage waveform signal, and this pre-process circuit is made up of the shaping be electrically connected successively, amplitude limit and filtering circuit.
3. the thunderbolt diagnosis based on leakage conductor according to claim 2 and real time warning device, it is characterized in that, described signal processing module comprises the spectrum computing unit for distributing according to the waveshape power frequency component of described equal proportion voltage waveform signal, and for the amplitude Orientation unit in the amplitude that identifies described equal proportion voltage waveform signal and direction.
4. the thunderbolt diagnosis based on leakage conductor according to claim 3 and real time warning device, it is characterized in that, described thunderbolt identification module comprises for analyzing described frequency component and exporting the action reason judging unit of high level when being struck by lightning and causing leakage conductor action, for exporting the thunderbolt type judging unit of thunder and lightning polarity and thunderbolt type according to the amplitude of equal proportion voltage waveform signal and direction when receiving described high level, and for storing described thunder and lightning polarity, the thunderbolt movement counting unit of thunderbolt type and leakage conductor actuation time and number of times, described action reason judging unit, thunderbolt type judging unit, thunderbolt movement counting unit is electrically connected successively.
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Cited By (7)
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| CN106841907A (en) * | 2016-12-12 | 2017-06-13 | 国网北京市电力公司 | The fault type judges method of overhead transmission line |
| CN109765441A (en) * | 2018-12-27 | 2019-05-17 | 国网浙江诸暨市供电有限公司 | The sub- fault judgment method of Intelligent insulation |
| CN109765440A (en) * | 2018-12-27 | 2019-05-17 | 国网浙江诸暨市供电有限公司 | The sub- lightning current monitoring device of Intelligent insulation |
| CN112684244A (en) * | 2020-11-10 | 2021-04-20 | 国网宁夏电力有限公司 | Method, medium and system for detecting action current type of lightning arrester |
| CN112730965A (en) * | 2020-12-23 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | DC line arrester over-current full waveform data acquisition device and method |
| CN114002548A (en) * | 2021-10-29 | 2022-02-01 | 沈阳铁路信号有限责任公司 | Lightning protection monitoring method and system with evaluation function |
| CN114217170A (en) * | 2021-12-15 | 2022-03-22 | 国网福建省电力有限公司 | Lightning invasion switch room positioning device and method based on earth screen current distribution |
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- 2014-11-06 CN CN201420662734.1U patent/CN204269739U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841907A (en) * | 2016-12-12 | 2017-06-13 | 国网北京市电力公司 | The fault type judges method of overhead transmission line |
| CN106841907B (en) * | 2016-12-12 | 2020-06-19 | 国网北京市电力公司 | Fault type judgment method for overhead transmission line |
| CN109765441A (en) * | 2018-12-27 | 2019-05-17 | 国网浙江诸暨市供电有限公司 | The sub- fault judgment method of Intelligent insulation |
| CN109765440A (en) * | 2018-12-27 | 2019-05-17 | 国网浙江诸暨市供电有限公司 | The sub- lightning current monitoring device of Intelligent insulation |
| CN112684244A (en) * | 2020-11-10 | 2021-04-20 | 国网宁夏电力有限公司 | Method, medium and system for detecting action current type of lightning arrester |
| CN112684244B (en) * | 2020-11-10 | 2022-08-30 | 国网宁夏电力有限公司 | Method, medium and system for detecting action current type of lightning arrester |
| CN112730965A (en) * | 2020-12-23 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | DC line arrester over-current full waveform data acquisition device and method |
| CN114002548A (en) * | 2021-10-29 | 2022-02-01 | 沈阳铁路信号有限责任公司 | Lightning protection monitoring method and system with evaluation function |
| CN114217170A (en) * | 2021-12-15 | 2022-03-22 | 国网福建省电力有限公司 | Lightning invasion switch room positioning device and method based on earth screen current distribution |
| CN114217170B (en) * | 2021-12-15 | 2024-01-23 | 国网福建省电力有限公司 | Lightning invasion switch room positioning device and method based on ground network current distribution |
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